[Samba] mount.cifs: regular freezes with s3fs

[steve]

On 18/10/12 11:48, Jeff Layton wrote:
> On Thu, 18 Oct 2012 10:18:05 +0200
> steve <steve at steve-ss.com> wrote:
>
>> cifs-utils-5.6
>> samba Version 4.0.0rc3
>> openSUSE 12.2
>> LAN of XP, w7 and Linux clients under Samba4 DC and s3fs fileserver
>>
>> Hi
>> I am testing the possibility of migrating from nfs to cifs to serve our
>> Linux clients.
>>
>> Currently we mount the samba shares, e.g. the home directory, using nfs.
>>
>> The test setup is that instead of:
>> mount -t nfs hh1:/home2 /home2 -osec=rw,krb5
>> I changed to:
>> mount -t cifs //hh1/home2 /home2 -osec=rw,sec=krb5,multiuser
>>
>> This works fine for console logins, but is very slow (unusable) for
>> graphical logins to either LXDE or XFCE.
>>
>> The login sometimes works:
>> Kerberos: AS-REQ steve3 at HH3.SITE from ipv4:192.168.1.41:57380 for
>> krbtgt/HH3.SITE at HH3.SITE
>> Kerberos: Client sent patypes: 149
>> Kerberos: Looking for PKINIT pa-data -- steve3 at HH3.SITE
>> Kerberos: Looking for ENC-TS pa-data -- steve3 at HH3.SITE
>> Kerberos: No preauth found, returning PREAUTH-REQUIRED -- steve3 at HH3.SITE
>> Kerberos: AS-REQ steve3 at HH3.SITE from ipv4:192.168.1.41:41237 for
>> krbtgt/HH3.SITE at HH3.SITE
>> Kerberos: Client sent patypes: encrypted-timestamp, 149
>> Kerberos: Looking for PKINIT pa-data -- steve3 at HH3.SITE
>> Kerberos: Looking for ENC-TS pa-data -- steve3 at HH3.SITE
>> Kerberos: ENC-TS Pre-authentication succeeded -- steve3 at HH3.SITE using
>> arcfour-hmac-md5
>> Kerberos: AS-REQ authtime: 2012-10-18T09:57:33 starttime: unset endtime:
>> 2012-10-18T19:57:33 renew till: 2012-10-19T09:55:48
>> Kerberos: Client supported enctypes: aes256-cts-hmac-sha1-96,
>> aes128-cts-hmac-sha1-96, des3-cbc-sha1, arcfour-hmac-md5, using
>> arcfour-hmac-md5/arcfour-hmac-md5
>> Kerberos: Requested flags: renewable, forwardable
>> Kerberos: TGS-REQ steve3 at HH3.SITE from ipv4:192.168.1.41:50790 for
>> host/hh7.hh3.site at HH3.SITE [canonicalize, renewable, forwardable]
>> Kerberos: TGS-REQ authtime: 2012-10-18T09:57:33 starttime:
>> 2012-10-18T09:57:33 endtime: 2012-10-18T10:02:33 renew till:
>> 2012-10-19T09:55:48
>> Kerberos: TGS-REQ steve3 at HH3.SITE from ipv4:192.168.1.41:44350 for
>> cifs/hh1 at HH3.SITE [canonicalize, renewable, forwardable]
>> Kerberos: TGS-REQ authtime: 2012-10-18T09:57:33 starttime:
>> 2012-10-18T09:57:33 endtime: 2012-10-18T19:57:33 renew till:
>> 2012-10-19T09:55:48
>>
>> But then as soon as we open the file manager (or do anything else) it
>> freezes for as long as 5 minutes, before it makes another cifs request
>> and comes alive for a while:
>>
>> Terminating connection - 'wbsrv_call_loop: tstream_read_pdu_blob_recv()
>> - NT_STATUS_CONNECTION_DISCONNECTED'
>> single_terminate: reason[wbsrv_call_loop: tstream_read_pdu_blob_recv() -
>> NT_STATUS_CONNECTION_DISCONNECTED]
>> Kerberos: TGS-REQ steve3 at HH3.SITE from ipv4:192.168.1.41:58872 for
>> cifs/hh1 at HH3.SITE [canonicalize, renewable, forwardable]
>> Kerberos: TGS-REQ authtime: 2012-10-18T09:57:33 starttime:
>> 2012-10-18T09:59:58 endtime: 2012-10-18T19:57:33 renew till:
>> 2012-10-19T09:55:48
>>
>> It is then OK for a few minutes more until it freezes again until the
>> next cifs request etc etc. . .
>>
>> This sometimes occurs in the samba log but with different files each time:
>> usr/local/samba/sbin/smbd: Oplock break failed for file
>> home/steve3/.cache/openbox/openbox.log -- replying anyway
>>
>> Here is the test smb.conf:
>>
>> # Global parameters
>> [global]
>>           workgroup = MARINA
>>           realm = hh3.site
>>           netbios name = HH1
>>           server role = active directory domain controller
>>           dns forwarder = 192.168.1.1
>>           idmap_ldb:use rfc2307 = Yes
>>           unix extensions = Yes
>>           panic action = /home/steve/samba-master/selftest/gdb_backtrace %d
>>
>> [netlogon]
>>           path = /usr/local/samba/var/locks/sysvol/hh3.site/scripts
>>           read only = No
>>
>> [sysvol]
>>           path = /usr/local/samba/var/locks/sysvol
>>           read only = No
>>
>> [home2]
>>           path = /home2
>>           read only = No
>>
>> Here is the wireshark of a login and a 'cifs freeze'.
>> https://dl.dropbox.com/u/45150875/cifs-freeze
>>
>> Please note that this works fine for the same user and data with both
>> nfs3 and nfs4.
>>
>
> I think you probably want send this sort of thing to
> linux-cifs at vger.kernel.org (cc'ed here), and not to me directly.

Sorry, I'll join the list.

>
> What kernel is the client running here?
>
3.4.6-2.10-desktop

Thanks,
Steve